Abstract: Under the conditions of a reaction temperature of 400 °C, a reaction pressure of 0.50 MPa (N² atmosphere) , a mass space velocity of 1.0 h^-1 and a light hydrocarbon/methanol mass ratio of 1∶1, the coupling aromatization of methanol with three light hydrocarbon feedstocks of reformer topped oil, aromatics raffinate oil and reformer pentane oil were studied. The results showed that the conversion of methanol was 100% within 72 hours. The content of isopentane in pentane oil was the highest and the yield of aromatics ranged from 26.30% to 35.13%, while the content of isopentane in the reformer topped oil was the lowest and the yield of aromatics ranged from 24.81% to 34.56% in the coupling aromatization of methanol with the reformer topped oil during the reaction. Aromatic hydrocarbons were produced by isomerization, aromatization, cyclization and hydrogen transfer, and a large number of n-alkanes reacted. When the raffinate oil reacted with methanol, the conversion of n-pentane was 97.19%, the conversion of n-hexane was 94.26% , and the mass fraction of aromatics was increased from 1.56% to 39.44% .

Key words: light hydrocarbon, methanol, coupling, aromatization